APPLICATIONS OF COMPOSITES FOR C5 SONAR DOME COMPONENTS

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Authors
  1. Koko, T.S.
  2. Connor, M.J.
  3. Corbett, G.V.
Corporate Authors
MARTEC Ltd, Halifax NS (CAN);Defence Research Establishment Atlantic, Dartmouth NS (CAN)
Abstract
Composite materials have seen increasing use, within the past decade, in many structural applications which exploit their superior specific strength and stiffness properties. In the marine community, their excellent corrosion resistant properties can also be exploited for use in corrosion sensitive components. This paper presents one such study. The study was undertaken to replace the stainless steel fairing band assembly components of the C5 hull mounted sonar dome with composite material, in order to eliminate the corrosion problems associated with the use of the stainless steel material. The fairing band assembly is used to wrap around the dome-hull interface to provide a smooth surface so as to reduce turbulence and flow noise. The fairing band assembly consists of two stainless steel bands (4400 mm x 140 mm x 0.9 mm) and a stainless steel tail cap which are fastened to the mild steel hull structure by means of stainless stell bolts. In the presence of moisture, a cathodic corrosion mechanism is created between the stainless steel fairing band components and the mild steel dome spacer. The resulting corrosion ruins the mounting threats in the dome spacer and this results in loss of the fairing band assembly. This requires the ship to be brought frequently to dry dock in order to perform corrective measures, thereby increasing the maintenance cost as well as reducing the operational readiness of the ship. TRUNCATED
Report Number
DREA-SR-97-002-PAP-8 — CONTAINED IN 98-00986
Date of publication
01 Oct 1997
Number of Pages
1
DSTKIM No
98-00994
CANDIS No
507211
Format(s):
Hardcopy;Document Image stored on Optical Disk

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